1 files changed, 9 insertions, 0 deletions

diff --git a/src/binary_state.rs b/src/binary_state.rs
index d512856..5648a18 100644
--- a/src/binary_state.rs
+++ b/src/binary_state.rs
@@ -2,8 +2,17 @@ use core::str::FromStr;
 
 use crate::constants;
 
+#[derive(Debug)]
 pub struct InvalidBinaryState;
 
+impl core::fmt::Display for InvalidBinaryState {
+    fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
+        f.write_str("invalid binary state, allowed values are 'ON' and 'OFF' (case insensitive)")
+    }
+}
+
+impl core::error::Error for InvalidBinaryState {}
+
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub enum BinaryState {
     On,